Dipper trip and tag line winder



zmme

Aug, 1, R39.

G. G. MoRnN ET AL DIPPER TRIP AND TAG LINE WINDER Original Filed Nov.19, 1935 INVENTOR 620m 6: MGR/IV Amp BY l/LE 0 (QPzEra/v Patented Aug.1, 1939 UNETED STATES Mass; said Carleton assignor to said MorinOriginal application November 19, 1935, Serial No, 50,554. Divided andthis application August 3, 1937, Serial No. 157,176

8 Claims.

This invention relates to excavating machinery of the type of shovels,cranes, and scoops, and has particular reference to an improved dippertrip or tag line mechanism.

Among the objects of the invention is to provide a simplified structurefor the purpose which is economical to manufacture, which is easilyassembled or disassembled, and in which heat generated in the clutchmechanism is efliciently and quickly dissipated.

A further object is to provide a mechanism of this character which maybe quickly and easily changed to control either a dipper trip or a tagline.

Other and further objects residing in the details of construction willbe apparent from the following specification and claims.

This application is a division of our prior copending applicatitonSerial No. 50,554, filed November 19, 1935, upon which Patent 2,094,278issued September 28, 1937.

In the accompanying drawing which illustrates one embodiment of theinvention,

Fig. 1 is a side view of the device;

Fig. 2 is a sectional view taken substantially on line 2-2 on Fig. l;and

Fig. 3 is a perspective view, partly in section, showing the clutchoperating cams.

Referring to the drawing, ill indicates a hollow shaft adapted to besecured by means of a threaded stud i l and pins E2 to the end of ashaft Iii. Shaft 53 is constantly driven from any suitable source ofpower, not shown, and thereby the hollow shaft it) is also constantlypower driven. A drum iii is mounted on shaft it for free rotationthereon by means of roller bearings 56. As shown, lubricant is suppliedto the bearings through a longitudinal duct i? and an annular channel itformed in stud l i, ports is in the shaft l giving the lubricant accessto the bearings from the channel it. Oil retaining washers 25, pressfitted or otherwise secured in the hub of the drum, and suitablepackings i, held in place by the washers, are arranged at the ends ofthe bearings it and the drum is permitted a slight movementlongitudinally of the shaft ii] for a purpose later described.

Drum I5 is provided with spaced peripheral flanges 22 and 23 betweenwhich the dipper trip cable til is wound. At least one of the peripheralflanges of the drum is offset from the spokes of the drum to provide arecess 25, and an annular friction plate 2? is secured to the outer faceof the adjacent flange as by screws 28. The plate 21 is provided on itsopposite faces with friction members 28 secured thereto by rivets it,the plate 21 with members 23 forming one member of a friction clutch.

Secured to the outer end of shaft it is a disk or wheel-like member 35which forms part of the second member of the clutch. Member 3! is formedwith a hub portion 32 press fitted on the shaft and keyed thereto as at33. The peripheral portion of member 3i nests in recess 26 between thebody of the drum and annular plate 2?. Member 31 is provided, radiallyinwardly of plate 21, with a plurality of pins t l upon which areslidably mounted an annular member 35 forming the sec- 0nd part of thedriving member of the clutch.

vided with a face cam member 36 having axially recessed portions 3i inwhich engage complementary axial projections 33 of a cam member 39. Cammember 39 is secured to a brake drum ii], the periphery of which isadapted to be engaged by any suitable braking means such as the brakeband ll. The peripheral portion of the brake drum is offset to overhangthe member 35.

The hub portion 32 is exteriorly threaded to receive a collar 42shouldered at it to form a bearing for the cam member 3%. Collar 52 isprovided with. a flange it between which and the back of cam 39 ispositioned a coiled spring i5 acting to keep the cams 3t and 39 ininterengagernent and force the clutch parts 38 and 35 into a slippingfrictional engagement with friction plate 27. As previously stated, thedrum it may slide on shaft it whereby the action of parts 3! and 35 onopposite faces of member 2'! is substantially equalized. The forceexerted by spring 35 may be adjusted by collar 32 within the limits ofthe bearing surface of shoulder 13, and is made sufficient to apply aslipping frictional engagement between the clutch. members to maintainthe trip cable taut. Normally the brake drum rotates with the member 35due to the interengagement of the cams. When it is desired to actuatethe dipper trip the brake band is tightened on the drum Ml, causingrelative movement between the cams so that the projections of cam is,riding out of the recesses of cam 36, force the clutch parts 3! and 35into driving engagement with member ill to rotate drum I5 and wind inthe tripping cable.

In order to convert the device for tag line operation it is onlynecessary to remove collar 42 and replace spring 35 with a stifferspring capable of increasing the constant slipping frictional engagementof the clutch members to maintain the tag line taut.

The free faces of members 3! and 35 are provided with heat dissipatingfins 41. By mounting the friction members 29 on plate 21 the heat causedby the constant slipping frictional engagement of the clutch members isgenerated at the face of members 3| and 35 and has only to pass throughsaid members which are of metal, to be dissipated by the fins 41.

To remove the plate 21 for renewal of the friction members 29 it is onlynecessary to unscrew collar 42, when the brake drum and mem ber 35 canbe slipped from the shaft and member 21 released by removing screws 28.

It will further be seen that by nesting the power driven clutch partsbeneath the offset flanges of the cable drum that the clutch membercarried by the cable drum may take the form of a simple annular platesecured directly to the flange of the drum and an exceedingly compactstructure of few parts is provided, the compactness being increased byoffsetting the brake drum over the adjacent clutch member.

We claim:

1. A dipper trip tag line winder for power shovels which comprises, apower shaft, a drum rotatably mounted on said shaft and havingperipheral flanges between which a dipper trip cable or tag line may bewound, a two-part friction clutch member secured to the shaft, saidparts being movable toward and from each other, an annular plate securedto one flange of the drum and extending radially inward between theoperating faces of the clutch parts, friction members secured to theopposite faces of said plate for engagement with the clutch parts, aspring acting to constantly urge the clutch parts into slippingfrictional engagement with. the friction members on said plate, meansfor forcing the clutch parts into driving relation with friction memberson the plate, and fins on the outer faces of the clutch parts todissipate the heat generated on the parts by their slipping engagementwith the friction members of the plates.

2. A dipper trip or tag line winder for power shovels which comprises, apower shaft, a drum rotatably mounted on said shaft and havingperipheral flanges between which a dipper trip cable or tag line may bewound, a two-part friction clutch member secured to the shaft, saidparts being movable toward and from each other, an annular plate securedto one flange of the drum and extending radially inward between theoperating faces of the clutch parts, friction members secured to theopposite faces of said plate for engagement with the clutch parts, aspring acting to constantly urge the clutch parts into slippingfrictional engagement with the friction members on said plate, and meansfor forcing the clutch parts into driving relation with friction memberson the plate, said drum having a sufficient degree of free longitudinalmovement on the shaft to permit said plate to center itself between theclutch parts and substantially equalize the degree of frictionalengagement between the parts and the friction members of the plate.

3. A dipper trip or tag line winder for power shovels which comprises, apower shaft, a drum rotatably mounted on said shaft and havingperipheral flanges between which a dipper trip cable or tag line may bewound, a two-part friction clutch member secured to the shaft, saidparts being movable toward and from each other, an annular plate securedto one flange of the drum and extending radially inward between theoperating faces of the clutch parts, friction members secured to theopposite faces of said plate for engagement with the clutch parts, aspring acting to constantly urge the clutch parts into slippingfrictional engagement with the friction members on said plate, and meansfor forcing the clutch parts into driving relation with friction memberson the plate.

4. A dipper trip or tag line winder for power shovels which comprises, apower shaft, a drum rotatably mounted on said shaft and havingpcripheral flanges between which a, dipper trip cable or tag line may bewound, a two-part friction clutch member secured to the shaft, saidparts being movable toward and from each other, an annular plate securedto one flange of the drum and extending radially inward between theoperating faces of the clutch parts, friction members secured to theopposite faces of said plate for engagement with the clutch parts, aspring acting to constantly urge the clutch parts into slippingfrictional engagement with the friction members on said plate, means forforcing the clutch parts into driving relation with friction members onthe plate, said drum having a sufficient degree of free longitudinalmovement on the shaft to permit said plate to center itself between theclutch parts and substantially equalize the degree of frictionalengagement between the parts and the friction members of the plate, andfins on the outer faces of the clutch parts to dissipate the heatgenerated on the parts by their slipping engagement with the frictionmembers of the plates.

5. A dipper trip or tag line winder for power shovels which comprises apower shaft having a free end, a drum rotatably moimted on said shaftadjacent the free end, and having peripheral flanges between which adipper trip cable or tag line may be wound, an annular plate secured tothat flange of the drum adjacent the free end of the power shaft andextending radially inward toward the shaft, friction members secured toopposite sides of the plate, a clutch member having a hub portion fixedto the shaft and extending substantially to the free end thereof, theperipheral portion 'of said clutch member extending radially outwardlybetween the drum, and said plate and engaging the friction member on theadjacent face of the latter, a second clutch member carried by the firstclutch member for movement toward and from the latter, a brake actuatedcam mechanism surrounding said hub for forcing the clutch members intodriving relation with said plate, a spring normally maintaining theclutch members in slipping frictional engagement with said plate and acollar threaded on the hub for holding the parts in assembled relation.

6. A dipper trip and tag line winder for power shovels which comprises apower shaft, a drum rotatably mounted on said shaft and havingperipheral flanges between which a dipper trip cable or tag line may bewound, one side face of the drum being recessed, a two-part frictionclutch member secured to the shaft, said parts being movable toward andfrom each other, one part of said clutch member being nested in saidrecess to position the opposed operating faces of said partssubstantially in the plane of the outer face of the adjacent peripheralflange of the drum, an annular friction member secured to said adjacentperipheral flange and extending radially inward between the operatingfaces of the parts of the clutch member, a spring constantly acting tourge the parts of the clutch member into a slipping frictionalengagement with said annular member, and means for forcing the parts ofsaid clutch member into driving relation with said annular frictionmember.

7. A dipper trip and tag line winder for power shovels which comprisesapower shaft, a drum rotatably mounted on said shaft and havingperipheral flanges between which a dipper trip cable or tag line may bewound, one side face of the drum being recessed, a two-part frictionclutch member secured to the shaft, said parts being movable toward andfrom each other, one part of said clutch member being nested in saidrecess to position the opposed operating faces of said partssubstantially in the plane of the outer face of the adjacent peripheralflange of the drum, an annular friction member secured to said adjacentperipheral flange and extending radially inward between the operatingfaces of the parts of the clutch member, a spring constantly acting tourge the parts of the clutch member into a slipping frictionalengagement with said annular member, normally interengaging cam membersoperable by relative angular displacement to force the parts of saidclutch member into driving relation with said annular friction member,and brake means for effecting such angular displacement of the cammembers, said means including a brake drum, said drum forming a housingfor the adjacent part of said clutch member.

8. A dipper trip and tag line winder for power shovels which comprises apower shaft, a drum rotatab-ly mounted on said shaft and havingperipheral flanges between which a dipper trip cable or tag line may bewound, one side face of the drum being recessed, a friction clutchmember secured to the shaft and nested in said recess to position itsoperating face substantially in the plane of the outer face of theadjacent peripheral flange of the drum, an annular friction membersecured to said adjacent peripheral flange and extending radially inwardover the face of said clutch member, a second clutch member mounted onthe first named clutch member for movement toward and from the latterand engaging the outer face of said annular member, a brake wheel havinga band receiving peripheral drum portion offset toward said annularmember to house said second clutch member, interengaging cam membersrespectively carried by said brake wheel and second clutch member, andcausing the brake wheel to normally rotate with the clutch members, aspring acting to normally hold the said cam members in interengagementand to constantly force said second clutch member into a slippingfrictional engagement with the said annular member to maintain the tripcable .taut, and means to apply a braking force to the periphery of thebrake drum to effect relative angular displacement of the cams andthereby force the clutch members into driving engagement with saidannular friction member.

GEORGE. G. MORIN. EMILE J. CARLEION.

